A gyroscopic roll stabilizer comprises a gimbal having a support frame and enclosure configured to maintain a below-ambient pressure, a flywheel assembly including a flywheel and flywheel shaft, one or more bearings for rotatably mounting the flywheel inside the enclosure, a motor for rotating the flywheel, and bearing cooling system for cooling the bearings supporting the flywheel. The bearing cooling system enables heat generated by the bearings to be transferred through the flywheel shaft to a heat sink disposed within a cavity in the end of the flywheel shaft, or to a liquid coolant circulating within the cavity.

A gyroscopic roll stabilizer includes an enclosure, a flywheel assembly, a bearing, a motor, and a bearing cooling circuit. The enclosure is mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure. The flywheel assembly includes a flywheel and flywheel shaft. The bearing rotatably mounts the flywheel assembly inside the enclosure for rotation about a flywheel axis. The bearing has an inner race and an outer race. The inner race is affixed to the flywheel shaft, and the outer race is held rotationally fixed relative to the enclosure. The motor is operative to rotate the flywheel assembly. The bearing cooling circuit is configured to transfer heat away from the bearing by recirculating cooling fluid along a closed fluid pathway. The gyroscopic roll stabilizer is configured to transfer heat away from the inner and/or outer race of the bearing to the cooling fluid.

A gyroscopic roll stabilizer includes an enclosure, a flywheel assembly, a bearing, a motor, and a bearing cooling circuit. The enclosure is mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure. The flywheel assembly includes a flywheel and flywheel shaft. The bearing rotatably mounts the flywheel assembly inside the enclosure for rotation about a flywheel axis. The bearing has an inner race and an outer race. The inner race is affixed to the flywheel shaft, and the outer race is held rotationally fixed relative to the enclosure. The motor is operative to rotate the flywheel assembly. The bearing cooling circuit is configured to transfer heat away from the bearing by recirculating cooling fluid along a closed fluid pathway. The gyroscopic roll stabilizer is configured to transfer heat away from the inner and/or outer race of the bearing to the cooling fluid.

Method of servicing or maintaining a gyroscope of an anti-roll stabilizer onboard of a seacraft. The method comprising a step of providing a seacraft provided with an anti-roll stabilizer. The stabilizer comprises a gyroscope comprising a container housing a rotor including a flywheel and a flywheel shaft that is rotatably mounted within said container by means of two support devices placed inside said container and arranged to support a respective end of said flywheel shaft so as to allow the relative rotation of said shaft with respect to said container. The container comprises a base portion mounted on a suspension held by a frame of the anti-roll stabilizer so as to be able to oscillate around a first axis transverse with respect to a rotation axis of the flywheel shaft. The container further comprises two end portions removably connected to said base portion. The method further comprising the steps of: removing one of the end portions from the base portion onboard of the seacraft; placing back said removed end portion and reconnecting said end portion with the base portion onboard of the seacraft; and pumping out air of the interior of the container of the gyroscope onboard of the seacraft after the container of the gyroscope has been reassembled.

Method of servicing or maintaining a gyroscope of an anti-roll stabilizer onboard of a seacraft. The method comprising a step of providing a seacraft provided with an anti-roll stabilizer. The stabilizer comprises a gyroscope comprising a container housing a rotor including a flywheel and a flywheel shaft that is rotatably mounted within said container by means of two support devices placed inside said container and arranged to support a respective end of said flywheel shaft so as to allow the relative rotation of said shaft with respect to said container. The container comprises a base portion mounted on a suspension held by a frame of the anti-roll stabilizer so as to be able to oscillate around a first axis transverse with respect to a rotation axis of the flywheel shaft. The container further comprises two end portions removably connected to said base portion. The method further comprising the steps of: removing one of the end portions from the base portion onboard of the seacraft; placing back said removed end portion and reconnecting said end portion with the base portion onboard of the seacraft; and pumping out air of the interior of the container of the gyroscope onboard of the seacraft after the container of the gyroscope has been reassembled.

A personal watercraft comprising a body having a seat and a hull, the seat configured to support a user with the body floating in water, a plurality of hydrofoils extending outwards from the body and coupled to a positioning system, the plurality of hydrofoils being configured, in combination, to raise the hull of the personal watercraft above a waterline in the water when the personal watercraft is in use and under the influence of a propulsion force, one or more sensors that provide sensor data of the watercraft during use, a computer-readable medium having a processor and a memory having instructions that, when executed by the processor read the sensor data, and based on the read sensor data, send a signal to the positioning system to adjust the position for at least one of the plurality of hydrofoils.

A personal watercraft comprising a body having a seat and a hull, the seat configured to support a user with the body floating in water, a plurality of hydrofoils extending outwards from the body and coupled to a positioning system, the plurality of hydrofoils being configured, in combination, to raise the hull of the personal watercraft above a waterline in the water when the personal watercraft is in use and under the influence of a propulsion force, one or more sensors that provide sensor data of the watercraft during use, a computer-readable medium having a processor and a memory having instructions that, when executed by the processor read the sensor data, and based on the read sensor data, send a signal to the positioning system to adjust the position for at least one of the plurality of hydrofoils.

The present invention relates to a balance maintaining device for a transport apparatus. The balance maintaining device comprises a loading frame formed to be long in the lengthwise direction thereof and having two or more first and second supports, which are respectively formed at both sides of the lower portion of the loading frame, and a lower frame provided at the lower portion of the loading frame, and having both upper sides thereof linked and coupled to the first and second supports. The outside of the lower frame is coupled to a transport apparatus so as to maintain the loading frame in a horizontal state when the transport apparatus is shaken.

The present invention relates to a balance maintaining device for a transport apparatus. The balance maintaining device comprises a loading frame formed to be long in the lengthwise direction thereof and having two or more first and second supports, which are respectively formed at both sides of the lower portion of the loading frame, and a lower frame provided at the lower portion of the loading frame, and having both upper sides thereof linked and coupled to the first and second supports. The outside of the lower frame is coupled to a transport apparatus so as to maintain the loading frame in a horizontal state when the transport apparatus is shaken.

Method of servicing or maintaining a gyroscope of an anti-roll stabilizer onboard of a seacraft. The method comprising a step of providing a seacraft provided with an anti-roll stabilizer. The stabilizer comprises a gyroscope comprising a container housing a rotor including a flywheel and a flywheel shaft that is rotatably mounted within said container by means of two support devices placed inside said container and arranged to support a respective end of said flywheel shaft so as to allow the relative rotation of said shaft with respect to said container. The container comprises a base portion mounted on a suspension held by a frame of the anti-roll stabilizer so as to be able to oscillate around a first axis transverse with respect to a rotation axis of the flywheel shaft. The container further comprises two end portions removably connected to said base portion. The method further comprising the steps of: removing one of the end portions from the base portion onboard of the seacraft; placing back said removed end portion and reconnecting said end portion with the base portion onboard of the seacraft; and pumping out air of the interior of the container of the gyroscope onboard of the seacraft after the container of the gyroscope has been reassembled.